Include generated AuthTokenGenerator wrapper class for reference to r…

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Sources/Services/AWSRDS/Sources/AWSRDS/AuthTokenGenerator.swift

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+//
+// Copyright Amazon.com Inc. or its affiliates.
+// All Rights Reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+// Code generated by smithy-swift-codegen. DO NOT EDIT!
+
+
+
+@_spi(AuthTokenGenerator) import class AWSClientRuntime.AuthTokenGenerator
+import SmithyIdentity
+import struct Foundation.TimeInterval
+
+/// A utility class with a single utility method that generates IAM authentication token used for connecting to RDS.
+public class AuthTokenGenerator {
+    private let generator: AWSClientRuntime.AuthTokenGenerator
+
+    /// The initializer that takes in AWSCredentialIdentity struct to use to generate the IAM authentication token.
+    public init(awsCredentialIdentity: AWSCredentialIdentity) {
+        self.generator = AWSClientRuntime.AuthTokenGenerator(awsCredentialIdentity: awsCredentialIdentity)
+    }
+
+    /// The initializer that takes in a specific AWSCredentialIdentityResolver, used to resolve the AWSCredentialIdentity used to generate the IAM authentication token.
+    public init(awsCredentialIdentityResolver: any AWSCredentialIdentityResolver) async throws {
+        self.generator = try await AWSClientRuntime.AuthTokenGenerator(awsCredentialIdentityResolver: awsCredentialIdentityResolver)
+    }
+
+    /// Updates the AWS credentials used to generate the IAM auth token.
+    public func updateCredentials(newAWSCredentialIdentity: AWSCredentialIdentity) {
+        generator.updateCredentials(newAWSCredentialIdentity: newAWSCredentialIdentity)
+    }
+
+    /// Updates the AWS credentials used to generate the IAM auth token by resolving credentials from passed in resolver.
+    public func updateCredentials(awsCredentialIdentityResolver: any AWSCredentialIdentityResolver) async throws {
+        try await generator.updateCredentials(awsCredentialIdentityResolver: awsCredentialIdentityResolver)
+    }
+
+    /// Generates authenetication token using given inputs to the method and credential identity instance variable.
+    ///
+    /// - Parameters:
+    ///   - endpoint: The endpoint of the RDS instance. E.g., `rdsmysql.123456789012.us-west-2.rds.amazonaws.com`
+    ///   - port: The port of the RDS instance to connect to. E.g., `3306`
+    ///   - region: The region that RDS instance is located in. E.g., `us-west-2`
+    ///   - username: The username of the RDS database user. E.g., `admin`
+    ///   - expiration: The expiration for the token in seconds. Default is 900 seconds (15 minutes).
+    public func generateAuthToken(
+        endpoint: String,
+        port: Int16,
+        region: String,
+        username: String,
+        expiration: TimeInterval = 900
+    ) async throws -> String {
+        return try await generator.generateAuthToken(
+            endpoint: endpoint,
+            port: port,
+            region: region,
+            username: username,
+            expiration: expiration
+        )
+    }
+}